I've been using the Eheim Everyday Fish feeder for years and have no complaints. Feeds either flake or pellets. I believe they have a "newer" version out that I saw when visiting @mta_morrow . So maybe he can comment. But again, no issues for me with the "older" Everyday Feeder.
Same. I typically feed frozen, but put the eheim over the tank and programmed it to feed a light lunch on top for a few days before leaving. The fish started responding to it as they would me opening the canopy to feed.